Means for controlling the flow of oil to injector-burners for steam-boiler furnaces



(No Model.)

S. BRAGGNS. MEANS FOR GONTROLLING THB FLGW-OF OIL T0l INJ'EGTOR BURNERS.

FOR STEAM BOILER FURNAGES.

Patented May-7, 1889.

UNITED STATES PATENT EETCE.

SETI-l BRAGGINS, OF ROCHESTER, NEV YORK.

MEANS FOR CONTROLLING THE FLOW 0F OIL T0 lNlECTOR-BURNERS FOR STEAM-BUILER FURNACES.

SPECIFICATION forming part of Letters Patent No. 402,896, dated May 7, 1889.

Application filed June 4, 1888. Serial No. 275,987. (No model.)

To @ZZ whom t may concern:

Beit known that I, SETH BRAGGINS, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Means for Cont-rolling the Flow of Oil to Injector-Burners for Steam- Boiler Furnaces, which improvement is fully set forth in the following specification and shown in the accompanying drawings.

My invention relates to means for regulating the supply` of fuel to furnaces, more particularly to the means for regulating the iiow of oil to the atomizer for a hydrocarbon-furnace.

The object of the invention is to operate a regulating-valve for the oil placed between the oil-reservoir and the atomizer by means of or in combination with a throttle-valve or a regulator for the flow and pressure of the steam, so that the oil-reservoir may be placed at a higher level or above the atomizer. It is found on some accounts best to place the oilreservoir above the discharge-opening of the atomizer, for when thus placed a supply of oil to the atomizer is always ready, from the action of gravity, to be acted upon by the atomizing-j et of steam.

Referring to the drawings, Figure l is a side elevation of a steam boiler or generator of common construction, showing in their relative places the various valves, pipes, oil-reservoirs, &c.; Fig. 2, a side elevation of some of the parts, seen as indicated by arrow @c in Fig. l, parts being broken away. Figs. 3 and 4, drawn to a larger scale, show axial sections of two forms or modilications of a valve for regulating the flow of oil; Fig. 5, an end view of the valve shown in Fig. 4, the latter being' sectioned, as on the dotted liney in Fig, 5 5 and Figs. '6 and 7, drawn to a still larger scale, show more fully the construction of the stopper or valve proper.

Referring to the parts shown in the drawings, A represents a boiler or steamgenerator of common kind, being of the vertical type, and constructed to be heated by atomized oil.

B is an atomizer for the oil or fuel, and l a combustion-tube, both of common construction.

O is a pipe connecting the steanrspace within the boiler with the atomizer, said pipe being provided with a throttle-valve or stop, D, of common construction.

E is a valve placed in the pipe O, for controlling the flow of steam through said pipe, this device being fully shown and described in my Patent No. 387,851, dated August 14, 1888.

l) is a pipe connecting said device with the water-space of the boiler.

F is a reservoir for holding the oil to be atomized, and a a pipe connecting said reservoir with the atomizer, said reservoir being placed above the atomizer, so that the oil will iiow to the latter from gravity.

G is a valve placed in the pipe a, between the oil-reservoir and the atomizer, for the purpose of opening or closing the passage through said pipe to regulate the flow of oil to the atomizer.

c is a branch pipe connecting the pipe C with the valve G, to make a continuous passage for steam from the generator to the valve, for the purpose of conducting steam into the latter to act upon the stop or valve proper therein in a manner hereinafter fully described. The pipe O in its course to the atomizer passes within the furnace to cause the steam carried to the atomizer to be superheated, which is a commonpractice. Said pipe, which supplies steam to the atomizer, also, by means of a branch, c, introduces steam upon one side of the diaphragm f, constituting a part of the valve structure G.

The valve or device G, for controlling the flow of oil through the pipe a, consists of a barrel, (l, Figs. 3 and 4, provided with an enlarged or expanded part, e, to hold a diaphragm, f, the part of the barrel of smaller diameter containing a stopper or valve proper, g, and an actuating-spring, h, therefor. As shown, the inflowing oil passes into the valve-chamber through a duct, t', and after passing the valve or stopper it flows outward through a duct, lo, toward the atomizer. The small end of. the valve or stopper abuts against the diaphragm, and the spring urges it thereagainst and against its seat s to close the passages for the oil to the atomizer.

In the form of valve shown in Fig. 4 the stopper or valve g is provided with a cushion or ring, n, of leather or similar soft material,

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to bear against the valve-seat s, the latter being the end of a tube or bushing, Z, reduced to an edge, as shown. The stemv or slender portion of the stopper, which rests in the tube Z, is made triangular in cross-section, or otherwise longitudinally iluted or grooved, to form passages o for the oil, which, after eseaping through the valve-opening, passes to the diaphragm-chamber, and thence out through the duct 7c, as clearly shown.

The diaphragm, which is of common kind, is held to place by a screw-cap, p, which latter completes the inclosure or chamber for the diaphragm. The branch pipe c connects the main steam-pipe C with the cap @which latter is pierced by a passage, r, forming a continuous connection for the iow of steam from the interior of the steam-generator to the diaphragm. The pressure of steam against the diaphragm acts against the force of the spring, the steam-pressure tending to lforce the valve or stopper off its seat to open the passage for the oil, While the action of the spring is to drive the stopper against its seat and close the passage. The spring is backed by a screw-plug, t, inserted in the end of the barrel d, which screw-plug may be made adjustable by means of a jam-nut, u. (Shown in Fig. 3.) In beginning to heat the generator before steam-pressure is produced, this plug may be partially unscrewed to relieve the tension of the spring, to allow the valve to be opened by the oil-pressure in pipe a., and the oil being ignited in tube I will furnish the initial heat and produce steam, to thereafter operate as herein set forth. It is customary in steam-generators of the same general character as the present to provide supplemental initial heating burners or grat-es, and my improvement isv not inconsistent with the use of such Well-known devices.vr

,The device E is used primarily for con- I f trolling the iioW of steam to the atomizer, 45

and it is so constructed that When the pressure Within the boiler reaches a predetermined limit the flow is stopped and the atolnizcr ceases to inject more fuel into the furnace. Y

In the construction and arrangement of the parts herein shown the device E not only regulates the iioW of steam to the atomizer, but it also regulates the flow of oil through the valve G to the atomizer, for when it closes the passage Ior the steam through the pipe C to the atomizer the steam-pressure against the diaphragm f is relieved at the same time, and the spring immediately forces the stopper g against its seat. After the valve at E is closed the steam that was in the pipe C below E and in the branch pipe c escapes at the exit-orifice of the atomizer, relieving the diaphragm f, with the result just stated. From what has just been said it will be understood that the valve g acts under eircumstances just the reverse of those under which similar supply-regulating lvalves actto Wit, when the steam-pressure acting upon it falls the valve closes, and it opens by an increased pressure of steam against it.

It will be understood that any form or construction of valve or device that will regulate the ilow of steam through the pipe C may be used at 13,01' that such device may be dispensed with altogether, depending Wholly upon the throttle-valve D to regulate the flow of steam through the pipe. It is necessary to have some kind of device in the pipe C to at times stop the flouT of steam tothe atomizer for the purpose of cutting oit the discharge of fuel into the furnace, and any device that will accomplish this will equally Well operate the valve at G to regulate the flow of oil.

IVhat I claim as my invention isl. In combination with a device for atomizing oil, an oil-reservoir, an oil-pipe connecting said atomizing device and reservoir, a valve in said oil-pipe, a spring within the valve-chamber to close the valve, and a diaphragm adapted to be pressed against a part of the valve to open the same, a steam-conduit to admit steam to the side of the diaphragm opposite the valve, and the steamboiler, substantially as shown and described.

2. In combination with a device for atomizing oil, an oil-reservoir, a pipe connecting said atomizing device and the reservoir, a valve in said pipe, a spring within the valvechamber to close the valve, and a diaphragm adapted to be pressed against the valve to open the same, a steam-conduitto convey steam to the side of the diaphragm opposite the valve, and the steam-generator, the axes of the valve, the spring, and the diaphragm being in a straight line, substantially as shown. y

3. In combination with a device for atomizing oil, a valveito control the flow of liquid fuel to the device for atomizing oil, connected with the steamgenerator by a steam-pipe and diaphragm, and a valve in said steam-pipe to control the i'loW of steam therein, said lat ter valve being adapted to be closed by a diaphragm located in a diaphragm-chamber in a steam-inlet pipe, and said fuel-regulating valve being acted upon by a spring tending to close the same, substantially as described.

4. In combination With a steam-generator and an oil-reservoir, an atomizing device for the oil, a conduit for the oil connecting said reservoir and device for atomizing the oil, and a valve in said Aconduit to control the flow of oil therein, said valve being acted upon by a steam-pressed diaphragm in a direction tending to raise it off its seat, and pressed by a spring in the opposite direction to close it, substantially as set forth.

SETII IRAGGINS.

NViti'lesses:

E. B. WHITMORE, M. L. McDERMoTT.

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